CN2386469Y - Photographic device for breast using planar array scanning digital x-ray - Google Patents

Abstract

The utility model relates to an X-ray breast photographic device for diagnosing breast diseases, which is provided with a lifting platform with a lifting arm. The upper and the lower parts of a mounting plate on the front end of the lifting arm are respectively provided with an X-ray source and box body which is provided with an area array scanning imaging unit inside; the upper end of the box body is provided with a fluorescent screen. When the utility model works, X-ray which is emitted by the X-ray source passes through a collimator and penetrates through the squeezed breast, and scanning imaging to the whole image plane is carried out by utilizing the area array imaging unit, so that an X-ray breast image with large imaging area, wide dynamic range and high spatial resolution can be obtained.

Description

Planar array scanning digital X ray breast photographic means

The utility model belongs to the medical diagnostic equipment technical field, relates to a kind of X ray breast photographic means that is used to diagnose galactophore series disease.

Breast cancer is the malignant tumour of galactophore epithelial cell, is women's one of 35～50 years old modal cancer knurl of age group women particularly.Disclosure according to the relevent statistics: 1997, the number that suffers from breast cancer in the world had people more than 910,000, and the number of dying from breast cancer is people more than 376000.In China, the M ﹠ M of breast cancer is also in rising trend in recent years.Up to now, though medical circle has been carried out the research of many decades to breast cancer, its ill mechanism still it be unclear that, and mortality in said patients is also still very high.In general, approximately want ten years when the lump of breast cancer develops in the time of directly feeling, many researchs show that all early diagnosis can make the cure rate of breast cancer reach more than 90%.The early stage most effectual way of checking of breast cancer is that the breast x-ray imaging is in conjunction with biopsy.Because that the microcalcifications of breast is attended by usually is little, touch less than breast cancer (being which early stage imperceptible breast cancer), and the X ray breast to take a picture be the unique method that detects microcalcifications.From good aspect, patient with breast cancer's survival rate slowly rises.Before 20 years, 5 years survival rates of patient's postoperative are 68%, have reached 77% now, realize that this progressive main reason is to take a picture with the X ray breast to have realized early diagnosing mammary cancer.Most of breast photos all are to take with special-purpose breast camera installation, because microcalcifications small-sized in the breast, contrast difference is very trickle, and in all medical X-ray image devices, space and contrast that breast is taken a picture to be needed are differentiated the highest.

Current general X ray breast photographic means all adopts traditional video screen-film system as image receiver, but its comparison and detection ability has only 2～5%, and detectable minimum microcalcifications is of a size of 0.25mm or bigger.Although video screen-film system has good quality because the dynamic range of X-ray film is little, be difficult to carry out image processing, thereby it to exist misdiagnosis rate and rate of missed diagnosis higher and read sheet speed and wait shortcoming slowly.

The purpose of this utility model is to overcome the defective that prior art exists, and a kind of comparison and detection ability height is provided, can accelerates the speed of taking pictures and reads sheet speed and image is convenient to the planar array scanning digital X ray breast photographic means handling and file.

Technical pattern scheme for achieving the above object is such: the planar array scanning digital X ray breast photographic means that is provided has the lifting table of a band lifting arm, front end at lifting arm is equipped with an installing plate, in being equipped with an x-ray source and one respectively, the upper and lower of installing plate establishes the casing of planar array scanning imaging unit, below x-ray source, be provided with collimating apparatus, be provided with video screen in the upper end of casing.

Compared with prior art, the utility model has adopted the imaging technique of planar array scanning, utilizes face battle array imaging unit to resemble the face scanned imagery to whole, thereby obtains that an imaging area is big, wide dynamic range, X ray breast image that spatial resolution is high.Owing to also do not have a kind of electronic image forming device of economy to come whole breast imaging with sufficiently high spatial resolution at present, thereby to adopt technical scheme described in the utility model be a very big progress.This device is placed collimating apparatus between patient and x-ray source, generate a beam X-ray, just aims at combinatorial surface battle array imaging unit, makes the nonimaging position avoid irradiation, has reduced the irradiation dose to the patient, has reduced the danger of bringing out tested photograph person's breast cancer.In addition, digitizing imaging technology does not need to develop photographic film, and does not need dark place equipment, is convenient to amplify and stretch, and can accelerate the speed of taking pictures greatly and read sheet speed, has reduced the cost of taking pictures, and makes it to be more suitable for generaI investigation.

Below with reference to accompanying drawing the utility model content is described further.

Fig. 1 is the structural representation of photographic means described in the utility model.

Fig. 2 is the principle schematic of planar array scanning imaging mechanism.

Fig. 3 is the schematic block diagram of planar array scanning digital X X-ray camera system.

As shown in Figure 1, planar array scanning digital X ray breast photographic means described in the utility model has the lifting table 1 of a front end band lifting arm 2, front end at lifting arm 2 is equipped with an installing plate 3, the upper and lower of installing plate be equipped with respectively x-ray source 4 and in establish the casing 8 of planar array scanning imaging unit 9, below x-ray source 4, be provided with collimating apparatus 5, set planar array scanning imaging unit 9 is the face battle array imaging unit of being made up of the lower ccd video camera of a plurality of spatial resolutions in the casing 8, the signal output part of this planar array scanning imaging unit is external in the image collection card of visual workstation, be provided with video screen 7 in the upper end of casing 8, be positioned at place, casing video screen 7 top positions at installing plate 3 anchor clamps 6 that one pair is used for the tested photograph person's breast of press nip are housed.Sequence number 10 is imaging unit motion axle among Fig. 1; 11 is crawler belt; 12 is stepper motor.

The principle of work of X ray breast photographic means described in the utility model as shown in Figures 2 and 3.The planar array scanning imaging mechanism comprise x-ray source 4, collimating apparatus 5, breast take a picture special-purpose video screen 7, face battle array imaging unit 9, regulate support, scan drive system and shell.Collimating apparatus 5 is used for X-ray beam is limited in the scope that is slightly larger than face battle array imaging unit imaging area, adopts the thick iron plate of 4mm.Face battle array imaging unit 9 is made up of a plurality of ccd video cameras, utilizes such face battle array imaging unit to the whole face scanned imagery that resembles, thus integrate obtain an imaging area big (18 * 24cm), digital X ray breast image that spatial resolution is high.The take a picture principal ingredient of special-purpose video screen 7 of breast is GdOS, is of a size of 18 * 24cm, is coupled with camera lens between ccd video camera and the video screen.For eliminating geometric distortion (mainly being barrel distortion), actual imaging area is more bigger than useful area.Regulate support locus (three-dimensional) that is used to adjust ccd video camera and the verticality that resembles face and with the depth of parallelism of guide rail, make it the imaging effect that reaches best.Scanning system adopts step motor drive, and collimating apparatus and face battle array imaging units synchronization move, all by computer control.The adjustment precision of adjusting bracket and the precision of scan drive system are all in a pixel.Shell plays interception, makes planar array scanning imaging system inside become the darkroom.During scanned imagery, image is being eliminated that geometric distortion, the face that resembles are inhomogeneous, is being pieced together the view picture image behind the single camera differences, is simple working very with the image reconstruction after proofreading and correct, and only needs effective cell array is arranged in together to get final product.The useful area of single CCD camera imaging is 4.5 * 6cm, effective imaging area of combination imaging unit is 4.5 * 24cm, the whole useful area that resembles face is 18 * 24cm behind the scanned imagery, and system can reach 0.083mm at the spatial discrimination of the face of resembling, and the pixel degree of depth is 10bit.Because the influence of x ray generator focus and video screen point spread function, the spatial discrimination of total system on the face of resembling can reach 0.1mm.The Senography2000D type full digitalization X ray breast photographic system of releasing in the world at the beginning of this technical indicator and 1999 is suitable, has reached the requirement of clinical practice inspection early-stage breast cancer.

In this photographic means course of work, after the X ray of x-ray source 4 emissions passes the breast B that is extruded then through collimating apparatus 5, its Strength Space distributes and has just comprised intramammary species distribution image, video screen 7 is the visible light image with this image conversion, planar array scanning imaging unit 9 is converted to analog electrical signal with visible light, pass to image collection card (being inserted in the expansion slot of visual workstation1 4) again, image collection card is converted to digitized gray scale image with analog electrical signal and deposits visual workstation1 4 in.In visual workstation1 4, can stretch, amplify or browse breast image, also can utilize computer-aided diagnosis software to provide diagnostic result automatically, the output of pictorial data comprises and utilizes high-resolution printer 16 printouts, utilize laser camera to generate film, be kept in the permanent carrier such as CD, also can transmit by wide area network or LAN (Local Area Network) 18.Sequence number 13 is a high pressure generator among Fig. 3; 15 is control desk; 17 is CD writer.

Photographic means described in the utility model not only can be used for the X ray breast takes a picture, and also can be applicable to other radiation imageable and visible light imaging field.

Claims (3)

1, a kind of planar array scanning digital X ray breast photographic means, it is characterized in that having the lifting table (1) of a band lifting arm (2), front end at lifting arm (2) is equipped with an installing plate (3), in being equipped with an x-ray source (4) and one respectively, the upper and lower of installing plate (3) establishes the casing (8) of planar array scanning imaging unit (9), be provided with collimating apparatus (5) in the below of x-ray source (4), be provided with video screen (7) in the upper end of casing (8).

2, X ray breast photographic means as claimed in claim 1 is characterized in that being positioned at place, casing video screen (7) top position at installing plate (3) is equipped with the anchor clamps (6) that a pair is used for the tested photograph person's breast of press nip.

3, X ray breast photographic means as claimed in claim 1 is characterized in that the face battle array imaging unit of planar array scanning imaging unit set in the casing (8) for being made up of a plurality of ccd video cameras.

Images